Game Makers

Definition
Game Makers are tool assisted, WYSIWYG-based game creation software.

Game Maker
Free for Windows, Mac (paid versions for Android, iOS)

http://www.yoyogames.com/gamemaker/studio

Stencyl
Stencyl for iOS and Flash Games

http://www.stencyl.com/

Construct
HTML5 Game Maker

https://www.scirra.com/

Game Salad
 Make iPhone/iPad games 

http://gamesalad.com/